Grinding and polishing machine.



J. HAUSMAN & J. o. BLBVNEY.

GRINDING AND POLISHING MACHINE.

APPLICATION FILED MAY 31, 1907.

Patent-ed Mar. 29, 1910.

3 SHEETS-SHEET 1.

J. HAUSMAN & J. C. BLBVNEY.

GRINDING AND POLISHING MACHINE.

APPLIUATION FILED MAY 31,1907.

Patented Mal'. 29, 1910.

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av7.7 w. ,if UW@ 71|I El# \\1 M La J. HAUSMAN & J. C. BLEVNBY.

GRINDING AND POLISHING MACHINE.

APPLICATION FILED MAY 31.1907,

Patented Mar.29, 1910.

3 SHEETS-SHEET 3.

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Annniw a ummm co. Fuow-mnoonwms wAsmNumn u u YUNITEDl STATES PATENTOFFICE.

JOHN HAUSMAN AND JOI-IN C. BLEVNEY, OF NEWARK, NEW JERSEY, ASSIGNORS T0THE ATI-IA. TOOL COMPANY, A CORPORATION OF NEW JERSEY.

GRINDING- AND POLISHING MACHINE.

Specification of Letters Patent.

Patented Mar. 29, 1910.

To all whom it may concer/n:

Be it known that we, JOHN HAUSMAN j and JOHN C. BLEVNEY, citizens of theUnited States, and residents of Newark, county of Essex, and State ofNew Jersey, have invented certain new and useful Improvements inGrinding and Polishing Machines, of which the following is aspecification.

Our invention relates to grinding machines and the objects thereof willbe fully understood from the following description taken in connectionwith the accompanying drawing, which forms part of this application, andin the different views of which the same reference character indicatesthe same art. P Referring to the drawings, Figure 1 is a front View ofthe machine with certain parts broken away. Fig. 2 is a side elevation.Fi 3 is a top plan view on an enlarged sca e with certain parts omittedand with the upper guide pulley in section. Fig. 4 is a sectional viewshowing the means for adjusting the driving` pulley. Fig. 5 is a frontview of the adjusting spider or frame on which one of the guide pulleysis mounted. Fig. 6 is a front face viewof a portion of the under beltshown in Figs. 1 and 2. Fig. 7 is a view of a portion of a modified formof belt. Fig. 8 is a diagrammatic view of a modication in which theunder belt is plain. Fi0u9 is a View showing a portion of said underbelt. Fig. 10 is a view, partly in section, of a modified constructionof work holder. Fig. 11 is a rear View of the same. Fig. 12 is a frontview.

' The part marked 1 on the drawing represents the frame of the machine.2 is the main driving shaft supported in adjustable bearings in thelower portion of said frame. To one end of this shaft is secured apulley 3, around which a belt, not shown, passes to drive the machine. 4is a driving pulley secured to the other end of the shaft.

This shaft is mounted in a sleeve 5, the middle portion of which isenlarged at 6 to form an oil chamber. That end of the sleeve `next tothe driving pulley 4 is provided with ribs 7, the outer faces 7 a ofwhich are circular. These ribs are fitted in a spherical shaped bearing8 formed on the inner portion of the shaft bearing 9. At the other endof the sleeve 5 there is formed a rectangular bearing 10, against thefaces of which bear the adjusting screws 11. This construction, it isseen, permits the pulley 4 carried by the shaft 2 to be adjusted ineither a horizontal or vertical direction by the movement of theadjusting screws 11.

The lower end of the frame 1 is provided with a recess 12 into whichprojects the inner end of a stud 13. This stud can be moved in and outof said recess and clamped in a fixed position by the clamping screw 14.To the front end of this stud is secured an adjustable sleeve 15carrying an adjustable work table 16 on which the work to be operated issecured.

At the upper end of the frame of the Ina- -chine is a plate 17. Pivotedto this plate at 18 is a vertical guide 19 having a dovetailed groove 20in the face thereof. Threaded in the recess at this end of the machineare two screws 21 and 22 to which are secured hand wheels 23 and 24. Theinner ends of these screws bear against the rear of the pivoted guide19.

25 is a head or slide having a dovetailed portion which fits into 4andmoves vertically in the dovetailed recess 2O of the guide 19. On thefront of this vertically moving guide is a lug 27 having a circularopening 28 therein. To the lower end of this slide is connected a lever29, said lever being pivoted at 30 to a screwthreaded rod 31. This rodprojects into the bearings 32 and carries between the bearings thescrewthreaded nut 33 by which the said rod 3l is adjusted vertically,and the point of pivot of the lever 29 is raised or lowered. Carried bythis lever is a counterbalance weight 34 which may be placed atdifferent positions on the lever to exert more or less force thereon.

35 is a frame or spider having lugs 36 thereon with openings 37 therein.This spider is pivoted to the lug 27 of the vertical slide 25 by a pivotpin or rod 39 passing through the openings 28 and 37 respectively, inthe lugs 27, 3G of the spider' 35. This spider has a downwardlyprojecting arm 42 in the lower end of which is an opening 43 into whichfits one end of the adjusting screw 44, the other end of the screwbearing against the face of the downwardly projecting portion of theslide 25. This screw is turned by a hand wheel or nut 45 to rock thespider on its pivot.

46 is a spring, one end of which bears against the upper portion of theslide 25 and the other end against the upper portion of the spider 35above the pivot pin and tends to 5 normally force the upper portion ofthe spider away from the slide 25. The spider has a hub 47 with anopening 48 therein, into which is secured one end of the stud or shaft49 on which is loosely journaled the guide pulley 50. IBy thisconstruction .the guide pulley may be adjusted as follows: Vverticallyby 'turning the adjusting wheel 33 to raise and lower the rod 31. Theweight 34 on 'the lever 29 normally forces the vertical slide 25`upwardly and keeps the shaft 49-and the pulley carried thereby in araised position. Secured tothe pivoted lug 51 of the rod 31 is a stop 52against which the short arm of the lever strikes and limits the upwardmovement of the vertical slide 25. By turning 4the nuts or hand wheels23 and 24, the adjusting screws 21 and 22 are moved to rock the guide 19laterally on its pivot 18 to adjust the shaft and pulley laterally orhorizontally. By operating the hand wheel 45 the screw 44 is moved toturn the spider 35 on its pivot and adjust the shaft 49 and the pulley50 in a vertical position.

In the preferred construction of our ap` paratus we place between thepulley 4 and the pulley 50, another pulley 50a mounted on va shaft 49a,said shaft being secured to adjusting apparatus of the same constructionas the shaft 49, the said adjusting apparatus operating in the samemanner as the adjusting apparatus heretofore described to adjust thesaid shaft 49'EL and pulley 50a. It is therefore unnecessary toredescribe these parts. F or cl-earness they are indicated by the samereference characters as the adjusting means already described, exceptthat there 'has been added to each reference character the letter 53 isa b elt passing around the pulleys 4 and 50a. This belt may be made ofleather or any other suitable material, and on the surface thereof is aseries of transverse, raised portions or proj ections54 with a series ofdepressions 55 between. These projections may be separate pieces securedto the belt, or the belt may be recessed at 55 to leave the projectionsthereon. Extending around the pulley 50 and around the pulley 4 outsidethe belt 53 is another belt 56. This latter belt is lmade of fabric,preferably cloth or webbing. The outer surface of said belt iscoveredwith a suitable abrading or polishing material, preferably emery.

Assuming that the pulleys 4, 50 and 50a are properly adjusted and apiece of work is secured to the work table 16, the operation of themachine is as follows: Power is applied to the driving `pulley3,whereupon rotary motion is transmitted to the pulley 4 andthe 65 belts53 and 56 are driven. The material or work to be'ground is broughtagainst the face of the emery belt 56 and this belt quickly andaccurately grinds the work.

The object of placing the belt 53 underneath or inside the belt 56 is toproduce a most satisfactory grinding of the work. When an emery beltalone is used the emery on the face of the belt, in some cases and insome classes of work, becomes detached from the face of the belt duringthe grinding process and said particles of emery roll up become lumpyand cause the work to be ground Vunevenly. By making the under face ofthe belt 53 'with raised portions and depressions lthis is avoided, forthe reason that the raised portions form elements which support thegrinding or polishing belt at a series of separated places andthedepressed portions form spaces into which contiguous .portions of thegrinding or polishing belt may enter when the abrasive material thereofis lumpy or rolls up. These disadvantages are also avoided by vplacingone belt within the other and causing `them to move at substantially thesame speed.' Secured to the frame of the machine is an adjustable plate,ytable or guide 57 for the purpose of keeping the belts to their workand preventing them from.

swaying or sagging. It is understood lthat in this grinding operationthe levers 29 and 29a are used and are connected to the vertical slides25 and 25a to keep the proper tension on the belts during the operationof grind ing. In some constructions it is not necessary to provide thebelt with raised projeotions or portions 54, and we may use instead of aleather lbelt a metal belt 53a, Fig. 7 of the drawing, which has aseries of openings 55a therein. This metal belt acts and accomplishesthe same purpose as the leather belt 53 in grinding certain classes ofmaterial, the solid portions of the belt forming the separated supportsfor the grinding or polishing belt and the openings forming Vthe spacesfor the portions of the grinding or polishing having the rolled or lumpyabra sive. Also, in some other classes of work we may use a plain belt53h, Figs. 8 and 9, which may be of leather, fabric or any othersuitable material.

In some constructions of our apparatus instead of using separate guidepulleys 50 and 50iL we may use only one guide pulley 5()b and cause bothbelts to pass over said pulley.

It is to be understood that in some types of belt that we use, said beltacts as a cushion to the grinding belt and this cushioning surfacecauses more perfect grinding by 'the emery belt.

It is understood that we do not confine ourselves to endless belts, asany continuous moving surface, Vwhether -in vbelt or other form, willaccomplish the result.

Instead of using such a work table asfwe have already described, we mayVuse such a vvork table or holder as shown in Figs. 10, 11 and l2 of thedrawing. In this construction of holder, 13a is a tube which fits intothe recess or socket 12 in the frame of the machine and is clamped inplace by the screw 14C. One side of the tube is provided with an undercut slit or channel 13b, and extending across the outer end of this tubeis a bar 13c having a screwthreaded opening 131 therein. Fitted on theoutside of this tube is a closed-in sleeve 60 having an opening 61therein. 62 is a screwthreaded rod journaled in the opening 61 andthreaded through the screwthreaded opening 18. The end of thisscrewthreaded rod has a hand wheel G3 by which it may be turned to movethe sleeve laterally on the tube 13a. Carried by this sleeve is adovetail shaped bolt 64C which fits in the under-cut or dovetail shapedopening 13b in the tube 13, and by which the sleeve 60 is secured in itsadjustable position by turning the nut 65 on the bolt 64. 66 is a lugprojecting upwardly from the sleeve 60. Surrounding this rod andadjustable laterally thereon is the sleeve 68, the ends of which aresplit at 68, and at these ends are lugs having bolts 69 by which thesleeve can be placed in any position on said rod 67. Secured to thissleeve is a work holder 70 having clamps 71 for holding the Work 72 tobe ground. In operating this work holder the nut 65 is loosened and thehand wheel 63 is turned to move the sleeve carrying the work holder 70to the proper position in front of the emery belt 56. When in thedesired position the nut G5 is tightened to hold the sleeve 68 in afixed position. The work holder is then turned to a horizontal position,as shown in Fig. l2, the work is secured on the holder and then theholder is raised to a vertical position, as shown in Figs. 10 and 11, tobring the piece of -work in proximity to the emery belt for grinding.The work holder is provided with a suitable handle 7 3 for raising andlowering the same. The sleeve 68is provided with the slit (58L and bolts69 to clamp the sleeve securely on the rod 67 or to take up the wear.The work holder being sleeved onto the rod 67 can not only be raised andlowered as just described, but it may be moved horizontally of the rodto cause the work to move across the face of the belt during theoperation of grinding or polishing.

While we have shown the preferred and simplest type of our invention,yet it is to be understood that what is illustrated and described hereis merely typical, as various changes may be made without departing fromthe spirit of our invention.

IVe desire it also to be understood that the language used in thefollowing claims is intended to cover all of the generic and speciefeatures of the invention here described 65 and all statements of thescope of the invention, which, as a matter of language, might be said tofall therebetween.

Having now described our invention, what we claim as new and desire tosecure by Let ters Patent is:

1. In combination with a grinding or polishing belt, means movingtherewith for cushioning the same, having a series of beltengagingelements separated ,from each other by spaces for the reception ofcontiguous portions of the belt under predetermined conditions, for thepurpose specified.

2. In combination with a grinding or polishing belt, a cushioning belttherefor moving therewith and having elements engaging the same at aseries of separated places, and spaces between said elements which arenormally free from contact with the grinding or polishing belt and serveto receive contiguous portions of the latter under predeterminedconditions.

3. In combination with a grinding or polishing belt, a cushioning belttherefor, having elements engaging the same at a series of separatedplaces and spaces between said elements which are normally free fromcontact with the grinding or polishing belt and serve to receivecontiguous portions of the latter under predetermined conditions, andmeans for moving the belts at substantially the same speed.

1. In a machine of the class described, a driving pulley, a guide ulley,an endless grinding or polishing bet passing around said pulleys,another guide pulley, and an endless belt passing around the drivingpulley and the last mentioned guide pulley inside the first mentionedbelt and having its outer surface provided with projections anddepressions forming supporting elements and pockets respectively for theouter belt.

5. In a machine of the class described, a drivin pulley, an adjustableguide pulley, an end ess grinding or polishing belt passing around saidpulleys, another adjustable guide pulley, and an endless belt passingaround the driving pulley and the last mentioned guide pulley inside thefirst mentioned belt and having its outer surface provided withprojections and depressions forming supporting elements and pocketsrespectively for the outer belt.

6. In a machine of the class described, a driving pulley, a guidepulley, an endless grinding or polishing belt passing around saidpulleys, another' guide pulley, and an endless belt passing around thedriving pulley and the last mentioned guide pulley inside the firstmentioned belt and having its outer surface provided with transverseprojections and depressions forming supporting elements and pocketsrespectively for the outer belt, a frame carrying the pulleys and a workholder secured to the frame and adjustable toward the first mentionedbelt.

7. In a machine of the class described, a driving pulley, a guidepulleytan endless grinding or polishing belt passing around saidpulleys, a second guide pulley, an endless belt passing around thedriving pulley and the second guide pulley inside the grinding orpolishing belt and having a series of elements which engage the lat-tei'and spaces between said elements into which contiguous portions of thegrinding or polishing belt rmay enter, means whereby said belts areadjustable relatively to each other, and means for holding the work tothe outer belt.

8. In a machine of the class described, a shaftbearing, said bearinghaving a spherical bearing or seat therein, a shaft, a sleeve on saidshaft having a spherical bearing mating with the spherical seat in theshaft bearing, means for adjusting the shaft in its bearings, and adriving `pulley on the shaft.

9. lIn a machine of the class described, a

yshaft bearing, said bearing having a spherical bearing or seat therein,a shaft, a sleeve on said shaft having a spherical bearing mating withthe spherical seat in the shaft bearing, means for adjusting the shaftin its bearings, a driving pulley on the shaft', a guide pulley, meansfor adjusting vsaid guide pulley, an endless belt passing around saidpulleys, and an endless grinding or polishing belt on the outside of thefirst mentioned belt.

10. In a machine of the class described, a driving pulley, a guidepulley, means for adjusting the guide pulley consisting of a pivotedguide, means for moving the guide on its pivot, a slide in the guide, aspider pivoted to the slide, means for moving the spider on its pivot, ashaft on which the guide pulley turns, said shaft being secured to thespider, and an endless belt passing over the driving pulley and theguide pulley.

11. In a machine of the class described, a driving pulley and a guidepulley, means for adjusting the guide pulley transversely and verticallyconsisting of a guide pivoted to the frame of the machine, an adjustingscrew on each side ofthe pivot of the guide, a slide movable in saidguide, a counterbalance lever connected to the slide, a spider pivotedto the slide, a spring and a screw connected to the guide to move it onits pivot, a shaft on which the guide pulley turns, said shaft beingsecured to the spider, and a belt passing over the pulleys.

12. In a machine of the class described, a grinding or polishing belt,means for driving the same, including a pulley engaged by the belt,supporting means for the pulley and separate devices for adjusting thesupporting means vertically and laterally.

13. 'In a machine of the class described, a grinding or polishing belt,mean-s for drivingthe same, including a pulley engaged by the belt, apivoted guide, a slide carried thereby and connections between vtheslide and pulley.

14. In a machine of the class described, a grinding or polishing belt,means for driving the same, including a pulley engaged by the belt, apivoted guide, a slide carried thereby, a counterweighted leverhavingconnection with the slide, adjustable means upon which the leveris fulcrumed and connections between the slide and pulley.

15. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys and means for supporting one of saidpulleys, comprising a plurality of members and connections between thesame adapted to permit relative adjustment of the members in a pluralityof planes.

16. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys, and means for adjusting one of thepulleys laterally and vertically comprising an element for supportingthe shaft of said pulleys, a bodily-movable guided adjustable supportfor said element, and means whereby said element is adjustable pivotallywith ieference to its support.

17. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys and means for supporting one of saidpulleys comprising a plurality of members, one of which supports theother, said members being relatively adjustable pivotally, and thesupporting member being also mounted for adjustment in planes at anangle with each other.

18. In a machine of the class described, a

driving pulley, a guide pulley, a belt engaging the pulleys and meansfor supporting one of said pulleys comprising a slidable member, apivoted support therefor, and connections between said member and thepulley.

19. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys and means for supporting one of saidpulleys comprising a slidable member, a pivoted support therefor, andconnections between said member and the pulley, said connectionsincluding a shaft supporting member, having pivotal connection with theslidable member` 20. In a machine ofthe class described, a drivingpulley, a guide pulley, a belt engaging the pulleys and means forsupporting one of said pulleys comprising a slidable member, a leverconnected thereto, an adjustable support upon which the lever isfulcrumed, and a counterbalancing means for the lever.

21. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleysand means for supporting one of said,pulleys 4comprising a pivoted guide, a slide carried thereby, `meansacting on the guide for adjusting the slide pivotally, means foradjusting the slide bodily with reference to the guide, and connectionsbetween the slide and the pulley.

22. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys and means for supporting one of saidpulleys comprising a pivoted guide, a slide carried thereby, meansacting on the guide for adjusting the slide pivotally, means foradjusting the slide bodily with reference to the guide, and connectionsbetween the slide and the pulley in# cluding an element for carrying thepulleyshaft, having pivotal connection with the slide.

23. In a machine of the class described, a driving pulley, a guidepulley, a belt engaging the pulleys and means for supporting one of saidpulleys comprising a pivoted guide, a slide carried thereby, meansacting on the guide for adjusting the slide pivotally, means foradjusting the slide bodily with reference to the guide, and connectionsbetween the slide and the pulley including a spring-pressed pivotedelement connecting the pulley with the slide, and an adjusting means forsaid element.

24. In a machine of the class described, a driving pulley, a guidepulley, their shafts, a belt passing over the pulleys, a slide withwhich the shaft of one pulley is connected, and means for moving theslide to keep the belt under tension, comprising a lever connected withthe slide and a counterweight adjustably mounted on the lever.

25. In a machine of the class described a driving pulley, a guidepulley, their shafts, a belt passing over the pulleys, a slide withwhich the shaft of one ulley is connected, and means for moving t eslide to keep the belt under tension, comprising a lever connected withthe slide, a counterweight adjustably mounted on the lever, means uponwhich the lever is fulcrumed and devices whereby said means areadjustable to raise or lower the fulcrum of the lever.

26. In a machine of the class described, a driving pulley, a guidepulley, their shafts, a belt passing over the pulleys, a slide withwhich the shaft of one pulle is connected, a lever connected with theslide, means acting on the lever and tending to force the slide in onedirection, and means whereby the fulcrum of the lever is adjustable.

27. In a machine of the class described, a driving pulley, a guidepulley, their shafts, a belt passing over the pulleys, a slide withwhich the shaft of one pulley is connected, a lever connected with theslide, means acting on the lever 'and tending to force the slide in onedirection, and means whereby the fulcrum of the lever is adjustable,comprising a threaded rod having a device upon which the lever isfulcrumed and a threaded device for raising or lowering the rod.

28. In a machine of the class described, a grinding or polishing device,an adjustable work holder consisting of a shaft or tube secured to themachine, an adjustable sleeve over the tube, a rod connected to the saidsleeve and work holder, a sleeve connected to the work holder, saidsleeve being carried by and adapted to be turned on the rod whereby thework holder may be turned in one direction while the work is beingsecured thereto and turned in another direction to bring the work intoContact with a grinding or polishing device.

29. In a machine of the class described, a continuously moving grindingor polishing belt, a tube secured to the machine, an adjustable sleeveon the tube, a rod connected to the sleeve, a work holder, a sleevesecured to the work holder, said sleeve being carried by and adapted tobe turned on the rod whereby the work holder may be turned in oneposition so that the work can be secured thereto and turned in lanotherpositionsto bring the work into contact with the grinding or polishingbelt.

In witness whereof we have hereunto set our hands at Newark county ofEssex and State of New Jersey this twenty-ninth day of May, 1907.

JOHN HAUSMAN. JOHN C. BLEVNEY. In presence of:

O'r'ro KUHN, WM. O. SCHRAFT.

